Intrinsic MicroRNA-10a Restricts Regulatory T Cell Suppressive Function and Intestinal Repair by Coordinating...

Area of Science:

• Immunology
• Molecular Biology
• Gastroenterology

Background:

• Regulatory T cells (Tregs) are crucial for immune homeostasis and suppressing intestinal inflammation.
• Mechanisms controlling Treg transcriptional and metabolic programs are not fully understood.
• Understanding Treg regulation is key for treating inflammatory bowel diseases (IBD).

Purpose of the Study:

• To identify regulators that constrain Treg function.
• To investigate the role of miR-10a in Treg suppressive capacity and intestinal crosstalk.
• To explore miR-10a's impact on Treg transcriptional, metabolic, and epithelial repair pathways.

Main Methods:

• Single-cell and bulk transcriptomic analyses in Tregs.
• Investigated miR-10a's direct targets, including Blimp1 and amphiregulin (Areg).
• Utilized mouse models of colitis to assess Treg function and intestinal barrier integrity.

Main Results:

• Treg-specific deletion of miR-10a promoted an effector Treg (eTreg) phenotype.
• MiR-10a deficiency enhanced Treg suppressive capacity and improved colitis alleviation.
• MiR-10a deficiency altered Treg metabolism via Uqcrq and improved intestinal barrier function through Areg regulation.

Conclusions:

• miR-10a acts as a key negative regulator of Treg suppressive function and metabolic reprogramming.
• miR-10a influences Treg-mediated intestinal epithelial repair.
• Targeting miR-10a presents a potential therapeutic strategy for inflammatory bowel diseases.